Is this ok for mosque visit or AIBU

[Itsrainingten]

Hi all
Hoping for some advice from Muslim ladies please. Would this be ok for Mosque visit while on holiday (with headscarf obviously) wasn't sure BC of slot on the back. But I'm thinking headscarf should cover that?

We visited a few mosques in Turkey, some of us wearing clothes that were less demure than that dress (can't part my daughter from her leggings), so I really wouldn't worry. We did have headscarves. All the mosques we went to, except Hagia Sophia, had coverups or headscarves for visitors to wear, though I don't know if this only happens at ones that get a lot of tourists. (At Hagia Sophia, if you didn't have a headscarf, you had to buy one at the entrance).